BN Business News
Add your company to Business Communicator →

Transport i infrastruktura · 5.11.2004

Airworthiness Directives; Boeing Model 747 Series Airplanes

The FAA proposes to supersede an existing airworthiness directive (AD) for certain Boeing Model 747 series airplanes. That AD currently requires inspections to detect cracks in the front spar pressure bulkhead chord, and repair, if necessary. This proposed AD would require repetitive high frequency eddy current (HFEC) inspections of the body station (BS) 1000 bulkhead chord for cracks, repetitive detailed inspections of the bathtub fittings, if installed, for cracks, and corrective action, if necessary. Accomplishment of new inspections would end the inspections of the existing AD. This proposed AD would also revise the applicability of the existing AD to include additional airplanes. This proposed AD is prompted by reports of cracks in the BS 1000 bulkhead chord. We are proposing this AD to detect and correct fatigue cracks in the BS 1000 bulkhead chord, which, if not repaired before they reach critical length, could result in the failure of the adjacent structure and skin and lead to in-flight depressurization of the airplane.

Source: Federal Register — Transportation DepartmentOpen original release →